WASHINGTON, July 22 (Xinhua) -- U.S. President Donald Trump on Tuesday accused former President Barack Obama of "treason" over the 2016 presidential election, prompting a fierce response from Obama's ...

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目前NASA仍在发射自己的火箭，但选择有限。该机构于2022年首次发射了由波音公司制造的太空发射系统 (SLS)，执行名为“阿尔忒弥斯1号”的绕月任务。该机构计划最早于2026年发射该火箭，执行第二次载人绕月任务“阿尔忒弥斯2号”。

Washington has long had a contentious relationship with UNESCO, repeatedly withdrawing over political grievances. In 1984, the Ronald Reagan administration pulled the United States out of the agency, ...